A.出方向
B.入方向
C.出和入方向

A.input policyinput policy   
B.output policy   
C.secondary input policy

A.show ver  
B.show chassis environment   
C.show config  
D.show env

A.root
B.admin
C.juniper
D.user

A.Sparse mode  
B.Dense mode  
C.Sparse-dense mode  
D.Dense-sparse mode

A.Forwarding class
B.Scheduler
C.Rewrite rule
D.Code-point alias

A.show isis adjacency  
B.show isis neighbo  
C.show isis interface  
D.show isis statistics

A.show route protocol bgp  
B.show route protocol bgp next-hop address   
C.show route protocol bgp export-policy   
D.show route advertising-protocol bgp neighbor-address

A.show route protocol bgp  
B.show route protocol bgp next-hop address   
C.show route protocol bgp export-policy   
D.show route advertising-protocol bgp neighbor-address

A.0
B.1
C.10
D.20

A.exact
B.longer
C.orlonger
D.upto